Plow seat Bracket

In the spring I really enjoy Plowing the field on my 2n but to tell you the truth after about 4 or 5 hours of riding on an angle in a 7" furrow my back and my shoulder,from pushing against the fender, bother me so bad I've got to quit. On my 23A oliver sulky plow under the seat is a lever so you can tilt the seat either way when in the furrow so that the seat is level. I realize the with a horse it's a little different but I would like to make the plowing even more enjoyable so I was thinking about making up a bracket to level the seat in the furrow. Has anyone made one before? if so I like to see some photos.